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    <title>Document</title>
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    <script>
        let arr = [1,2,'kkk',45];
        console.log(arr[0],arr[1]);
        // 默认值
        let [a,b,c,d,f='222'] = arr;
        console.log(a,b,c,d,f);
        let [,,,e] = arr;
        console.log(e);
    </script>
    <h1>1</h1>
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